added -v flag to UDPMirror so we can optionally see what's being forwarded on the console

java/com.sap.sailing.expeditionconnector/src/com/sap/sailing/expeditionconnector/UDPMirror.java

@@ -22,19 +22,30 @@ public class UDPMirror {
         if (args.length == 0) {
             usage();
         } else {
-            int listeningOnPort = Integer.valueOf(args[0]);
+            int c = 0;
+            boolean verbose = false;
+            if (args[c].equals("-v")) {
+                c++;
+                verbose = true;
+            }
+            int listeningOnPort = Integer.valueOf(args[c++]);
             byte[] buf = new byte[65536];
             DatagramSocket udpSocket = new DatagramSocket(listeningOnPort);
             DatagramPacket received = new DatagramPacket(buf, buf.length);
             DatagramSocket[] sendingSockets = new DatagramSocket[(args.length - 1) / 2];
             DatagramPacket[] mirroredPackets = new DatagramPacket[(args.length - 1) / 2];
-            for (int i = 1; i < args.length - 1; i += 2) {
-                sendingSockets[(i - 1) / 2] = new DatagramSocket();
-                mirroredPackets[(i - 1) / 2] = new DatagramPacket(buf, buf.length, InetAddress.getByName(args[i]),
-                        Integer.valueOf(args[i + 1]));
+            while (c < args.length - 1) {
+                sendingSockets[(c - 1) / 2] = new DatagramSocket();
+                mirroredPackets[(c - 1) / 2] = new DatagramPacket(buf, buf.length, InetAddress.getByName(args[c]),
+                        Integer.valueOf(args[c + 1]));
+                c += 2;
             }
             while (true) {
                 udpSocket.receive(received);
+                if (verbose) {
+                    String packetAsString = new String(received.getData(), received.getOffset(), received.getLength()).trim();
+                    System.out.println(packetAsString);
+                }
                 for (int i = 0; i < mirroredPackets.length; i++) {
                     mirroredPackets[i].setLength(received.getLength());
                     sendingSockets[i].send(mirroredPackets[i]);
@@ -44,6 +55,7 @@ public class UDPMirror {
     }
 
     private static void usage() {
-        System.out.println("Usage: java "+UDPMirror.class.getName()+" <listeningport> hostname1 port1 [hostname2 port2]*");
+        System.out.println("Usage: java "+UDPMirror.class.getName()+" [-v] <listeningport> hostname1 port1 [hostname2 port2]*");
+        System.out.println("  -v\tPrint packets received to stdout");
     }
 }